package cmd

import (
	"fmt"
	"log"
	"net/http"
	"os"
	"path/filepath"
	"strings"

	"github.com/spf13/cobra"
)

var servedevCmd = &cobra.Command{
	Use:   "servedev",
	Short: "Development server that parses and serves enhanced HTML files",
	Long: `Servedev starts a development HTTP server that automatically parses HTML files
for insertr elements and serves the enhanced content. Perfect for development workflow
with live rebuilds via Air.`,
	Run: runServedev,
}

var (
	inputDir string
	port     int
)

func init() {
	rootCmd.AddCommand(servedevCmd)

	servedevCmd.Flags().StringVarP(&inputDir, "input", "i", ".", "Input directory to serve")
	servedevCmd.Flags().IntVarP(&port, "port", "p", 3000, "Port to serve on")
}

func runServedev(cmd *cobra.Command, args []string) {
	// Resolve absolute path for input directory
	absInputDir, err := filepath.Abs(inputDir)
	if err != nil {
		log.Fatalf("Error resolving input directory: %v", err)
	}

	// Check if input directory exists
	if _, err := os.Stat(absInputDir); os.IsNotExist(err) {
		log.Fatalf("Input directory does not exist: %s", absInputDir)
	}

	fmt.Printf("🚀 Starting development server...\n")
	fmt.Printf("📁 Serving directory: %s\n", absInputDir)
	fmt.Printf("🌐 Server running at: http://localhost:%d\n", port)
	fmt.Printf("🔄 Manually refresh browser to see changes\n\n")

	// Create file server
	fileServer := http.FileServer(&enhancedFileSystem{
		fs:  http.Dir(absInputDir),
		dir: absInputDir,
	})

	// Handle all requests with our enhanced file server
	http.Handle("/", fileServer)

	// Start server
	addr := fmt.Sprintf(":%d", port)
	log.Fatal(http.ListenAndServe(addr, nil))
}

// enhancedFileSystem wraps http.FileSystem to provide enhanced HTML serving
type enhancedFileSystem struct {
	fs  http.FileSystem
	dir string
}

func (efs *enhancedFileSystem) Open(name string) (http.File, error) {
	file, err := efs.fs.Open(name)
	if err != nil {
		return nil, err
	}

	// For HTML files, we'll eventually enhance them here
	// For now, just serve them as-is
	if strings.HasSuffix(name, ".html") {
		fmt.Printf("📄 Serving HTML: %s\n", name)
		fmt.Println("🔍 Parser ran!")
		// TODO: Parse for insertr elements and enhance
	}

	return file, nil
}